Chris Brown Disses Rihanna With Karrueche Tran Birthday Tweet

Do you think this is a sign that Chris and Rihanna will never get back together?

Chris Brownsent a romantic birthday tweet to girlfriend Karrueche Tran— but it was Rihannawho really got the message! “Happy Bday beautiful!” Chris tweeted in the wee hours of May 16, along with a sexy Instagrammed picture of his girlfriend.